A number of questions first. Do you have all of the data files backed up on your system that you need to have later? This is important.
This should be the system specs for the 4600c or atleast some of them.
# Product: Dell Dimension 4600C
# Specs: With 2.8-GHz Pentium 4, 512MB DDR SDRAM, 80GB hard drive, DVD+RW drive, 64MB ATI All-in-Wonder 9000 graphics, 17-inch LCD
Do you have Service Pack 2 installed? If so the system recovery disk is useless except for the system image file.
If you are trying to do a system restore back to an earlier date and you have system restore turned off you are in a world of hurt because it is not going to work because there is no information there for it. So the best thing you can do is back up all of your data that is important to a CD-R or a DVD=/-R (This is important for either a system Restore or anything like it just to make your data safe.
If you have to do any type of restore or repair I would suggest the following two web sites:
The first is how to make a bootable repair disk with Service Pack 2 slipstreamed into it. The second is how to do a system repair.
How to build a XP-SP2 Recovery Disk = http://www.pcmag.com/article2/0,1759,1747010,00.asp
How to do a System Repair = http://www.michaelstevenstech.com/XPrepairinstall.htm